EFFICIENCY: Stata module to calculate investment efficiency based on Richardson (2006) model with data import functionality

Wu LiangHai (), Wu Hanyan (), Chen LiWen () and Liu Changyun ()
Additional contact information
Wu LiangHai: Anhui University of Technology
Wu Hanyan: Nanjing University of Aeronautics and Astronautics
Chen LiWen: Anhui University of Technology
Liu Changyun: Anhui University of Technology

Statistical Software Components from Boston College Department of Economics

Abstract: efficiency calculates investment efficiency measures based on the Richardson (Rev. Acct. Studies, 2006) model. This version includes functionality to import and merge Excel data files before estimation. The program automatically imports 10 Excel files (d1.xlsx to d10.xlsx) from the specified folder, merges them into a panel dataset, and then estimates the investment efficiency model.

Language: Stata
Requires: Stata version 18
Keywords: efficiency; accounting measures; investment (search for similar items in EconPapers)
Date: 2025-09-22, Revised 2025-10-06
Note: This module should be installed from within Stata by typing "ssc install efficiency". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
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Downloads: (external link)
http://fmwww.bc.edu/repec/bocode/e/efficiency.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/e/efficiency.sthlp help file (text/plain)
http://fmwww.bc.edu/repec/bocode/s/sunny_efficiency.do sample do-file (text/plain)
http://fmwww.bc.edu/repec/bocode/e/efficiency.zip zip file of xlsx files (application/zip)
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http://fmwww.bc.edu/repec/bocode/r/rawdata.xlsx xlsx file (application/x-ms-excel)

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